I'm no legal expert but you guys might have a hard time with a law suit since you don't own the car yet, but GM definitely has a case and your dealers may.

If there is a contract, there is a legal binding. I am sure these owners did not put down $$$ and order their vehicle without a contract. It seems to be a slam dunk for Camaro owners. I would sue both Chevrolet and Allied for breach of contract if you have a guaranteed delivery date and have put down $$$ to make sure it happened. Check your paperwork!